Omg! What did I do! How long do I have to wait before I can get this fixed/removed?? Got it 3 days ago... Hate it.

I actually likes the stencil he put on. But He shaded the whole thing green!!! We had not discussed any green shading except for the leaves. When I saw the green, I freaked out! I have an older tattoo there as well that he was going to make "match" my new one, but I had him stop as soon as I saw this. I hate this tattoo!!! Is there anyway to get rid or lighten the green in between & around the flowers/anchor without harming it? Or just get rid of the whole thing? Is that even possible? How long?